{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:H5UTV5DK2GV6VNNL2K6NCSICCJ","short_pith_number":"pith:H5UTV5DK","schema_version":"1.0","canonical_sha256":"3f693af46ad1abeab5abd2bcd149021243ab0eb95da18abc3992604ee94e00f1","source":{"kind":"arxiv","id":"0808.2933","version":2},"attestation_state":"computed","paper":{"title":"Rare decay $\\pi^{0}\\to e^+ e^-$ constraints on the light CP-odd Higgs in NMSSM","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Qin Chang, Ya-Dong Yang","submitted_at":"2008-08-21T14:03:23Z","abstract_excerpt":"We constrain the light CP-odd Higgs $A_{1}^{0}$ in NMSSM via the rare decay $\\pi^{0}\\to e^{+}e^{-}$. It is shown that the possible $3\\sigma$ discrepancy between theoretical predictions and the recent KTeV measurement of ${\\cal B}({\\pi}^{0}\\to e^+ e^-)$ cannot be resolved when the constraints from $\\Upsilon\\to\\gamma A_1^0$, $a_{\\mu}$ and $\\pi^{0}\\to \\gamma \\gamma$ are combined. Furthermore, the combined constraints also exclude the scenario involving $m_{A_1^0}=214.3$ MeV, which is invoked to explain the anomaly in the $\\Sigma^{+}\\to p \\mu^{+}\\mu^{-}$ decay found by the HyperCP Collaboration."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0808.2933","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"hep-ph","submitted_at":"2008-08-21T14:03:23Z","cross_cats_sorted":[],"title_canon_sha256":"efa9162df6f0820213c67711accfce1e09f5d5beb9c366e7af0d2ae50dafd944","abstract_canon_sha256":"cb9f15d59c637084984ad3809dc7aa84170ab611011bcc90614326f651e35fcc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:15.147803Z","signature_b64":"XuKVusNHN4+v/OmG2zvd0IvoCm08O1/bHSASn3wu4gIxuYF4BdMiVz8n6tW+F3ehQOC6Z3VnNsV3puwANc8yCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3f693af46ad1abeab5abd2bcd149021243ab0eb95da18abc3992604ee94e00f1","last_reissued_at":"2026-05-18T02:35:15.147308Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:15.147308Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Rare decay $\\pi^{0}\\to e^+ e^-$ constraints on the light CP-odd Higgs in NMSSM","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Qin Chang, Ya-Dong Yang","submitted_at":"2008-08-21T14:03:23Z","abstract_excerpt":"We constrain the light CP-odd Higgs $A_{1}^{0}$ in NMSSM via the rare decay $\\pi^{0}\\to e^{+}e^{-}$. It is shown that the possible $3\\sigma$ discrepancy between theoretical predictions and the recent KTeV measurement of ${\\cal B}({\\pi}^{0}\\to e^+ e^-)$ cannot be resolved when the constraints from $\\Upsilon\\to\\gamma A_1^0$, $a_{\\mu}$ and $\\pi^{0}\\to \\gamma \\gamma$ are combined. Furthermore, the combined constraints also exclude the scenario involving $m_{A_1^0}=214.3$ MeV, which is invoked to explain the anomaly in the $\\Sigma^{+}\\to p \\mu^{+}\\mu^{-}$ decay found by the HyperCP Collaboration."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.2933","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"0808.2933","created_at":"2026-05-18T02:35:15.147388+00:00"},{"alias_kind":"arxiv_version","alias_value":"0808.2933v2","created_at":"2026-05-18T02:35:15.147388+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.2933","created_at":"2026-05-18T02:35:15.147388+00:00"},{"alias_kind":"pith_short_12","alias_value":"H5UTV5DK2GV6","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_16","alias_value":"H5UTV5DK2GV6VNNL","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_8","alias_value":"H5UTV5DK","created_at":"2026-05-18T12:25:57.157939+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2512.13776","citing_title":"Improved Standard-Model predictions for $\\eta^{(\\prime)}\\to \\ell^+ \\ell^-$","ref_index":11,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/H5UTV5DK2GV6VNNL2K6NCSICCJ","json":"https://pith.science/pith/H5UTV5DK2GV6VNNL2K6NCSICCJ.json","graph_json":"https://pith.science/api/pith-number/H5UTV5DK2GV6VNNL2K6NCSICCJ/graph.json","events_json":"https://pith.science/api/pith-number/H5UTV5DK2GV6VNNL2K6NCSICCJ/events.json","paper":"https://pith.science/paper/H5UTV5DK"},"agent_actions":{"view_html":"https://pith.science/pith/H5UTV5DK2GV6VNNL2K6NCSICCJ","download_json":"https://pith.science/pith/H5UTV5DK2GV6VNNL2K6NCSICCJ.json","view_paper":"https://pith.science/paper/H5UTV5DK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0808.2933&json=true","fetch_graph":"https://pith.science/api/pith-number/H5UTV5DK2GV6VNNL2K6NCSICCJ/graph.json","fetch_events":"https://pith.science/api/pith-number/H5UTV5DK2GV6VNNL2K6NCSICCJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/H5UTV5DK2GV6VNNL2K6NCSICCJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/H5UTV5DK2GV6VNNL2K6NCSICCJ/action/storage_attestation","attest_author":"https://pith.science/pith/H5UTV5DK2GV6VNNL2K6NCSICCJ/action/author_attestation","sign_citation":"https://pith.science/pith/H5UTV5DK2GV6VNNL2K6NCSICCJ/action/citation_signature","submit_replication":"https://pith.science/pith/H5UTV5DK2GV6VNNL2K6NCSICCJ/action/replication_record"}},"created_at":"2026-05-18T02:35:15.147388+00:00","updated_at":"2026-05-18T02:35:15.147388+00:00"}